Using a 'safe' snprintf

inc/common/common.h

src/commands.c

src/common.c

src/database/config.c

src/database/find.c

src/database/open.c

src/database/playlist.c

src/database/queue.c

src/database/stickers.c

src/database/update.c

src/main/lkt.c

src/module/mpv.c

src/net/downloader.c

src/net/listen.c

src/uri.c